BD99954GW-E2

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Function:	Battery Monitor
Battery Chemistry:	Lithium-Ion
Number of Cells:	1 ~ 4
Fault Protection:	Over Voltage, Short Circuit
Interface:	I²C, SMBus
Operating Temperature:	-30°C ~ 85°C
Package / Case:	41-UFBGA, CSPBGA
Supplier Device Package:	UCSP55M3C

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PMIC - Battery Management

The BD99954GW-E2 is a PMIC – Battery Management device which is used for monitoring and charging Lithium-ion (Li-ion) and Lithium-ion polymer (Li-ion-polymer) batteries. This single chip device integrates a charge controller, an A/D converter, an integrated peripheral, and some protection features. This multi-purpose device maximizes flexibility, reduces development and validation costs, and decreases system complexity.

Application Field

The BD99954GW-E2 PMIC is suitable for a wide range of applications that require monitoring and charging Lithium-ion or Lithium-ion polymer batteries. The device is designed to provide a solution for the wide range of different kinds of battery and charger combinations in the mobile and consumer device markets. Some of the major applications for the BD99954GW-E2 PMIC are:

• Smartphones
• Tablets
• Personal digital assistants (PDAs)
• Notebooks

Working Principle

The BD99954GW-E2 is a highly integrated, multi-functional PMIC that is optimized for high-end devices. The heart of the device is a simple pulse-width modulation (PWM)-based charging controller, which utilizes synchronous rectification, giving the device a low output resistance. This multi-function device features a highly accurate analog-to-digital converter (ADC) which provides four programmable input channels providing additional flexibility, as well as protection features to prevent over-discharge and overheating. The device also features a highly efficient Simple Switcher, which is a synchronous buck converter that uses synchronous rectification to further improve efficiency. Its constant frequency PWM conversion allows the potential use of low-cost, small-size external components, while still providing excellent thermal performance. The output voltage of the device can be programmed within the range from 0 to 4.35V, allowing it to support a wide array of charging protocols. The device also supports a feature known as End-of-Charge Detection, which protects against overcharging, by monitoring the end voltage of the charging cycle. The BD99954GW-E2 also supports pulse-charging and step-charging, allowing for efficiency and flexibility in finding the best solution for different applications. It also supports pass-through charging, allowing the device to directly inject a low-noise DC voltage from an external source, such as a wall adapter, into the battery.

Conclusion

The BD99954GW-E2 is an advanced Power Management – Battery Management PMIC designed to maximize flexibility, reduce development and validation costs, and decrease system complexity. This multi-purpose device is suitable for a wide range of applications requiring monitoring and charging of Lithium-ion and Lithium-ion-polymer batteries. The device also supports a variety of charging protocols, including pulse-charging, two-step charging, pass-through charging, and End-of-Charge Detection. With its highly efficient Simple Switcher, the BD99954GW-E2 is an ideal solution for high-end mobile and consumer devices.

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